Programming-Principle-Group-A

package datamanagement;

import org.jdom.Document; import org.jdom.input.SAXBuilder; import java.io.FileWriter; import org.jdom.output.Format; import org.jdom.output.XMLOutputter; import java.io.IOException; import org.jdom.JDOMException;

public class XMLManager { private static XMLManager self = null;

    private Document doc;
    public static XMLManager getXML() { if (self == null ) self = new XMLManager(); return self;

} private XMLManager() {init();

}

public void init() { String s = AppProperties.getInstance().getProperties().getProperty("XMLFILE"); try { SAXBuilder b = new SAXBuilder(); b.setExpandEntities(true); doc = b.build(s);}

            catch (JDOMException e) {

System.err.printf( "%s", "DBMD: XMLManager : init : caught JDOMException\n" ); throw new RuntimeException("DBMD: XMLManager : init : JDOMException");} catch (IOException e) { System.err.printf( "%s", "DBMD: XMLManager : init : caught IOException\n" );

throw new RuntimeException("DBMD: XMLManager : init : IOException"); }
}
public Document getDocument() { return doc; }

public void saveDocument() {
    String xmlfile = AppProperties.getInstance().getProperties().getProperty("XMLFILE");
            try (FileWriter fout = new FileWriter(xmlfile)) {

XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat()); outputter.output(doc, fout); fout.close(); } catch (IOException ioe) { System.err.printf( "%s\n", "DBMD : XMLManager : saveDocument : Error saving XML to " + xmlfile); throw new RuntimeException("DBMD: XMLManager : saveDocument : error writing to file"); }}}